July 2013
Intermediate to advanced
370 pages
8h 27m
English
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3.7 Dynamic: To Be or Not to Be?
Given that Groovy is a dynamically typed language that supports optional typing, should we specify the type or rely on dynamic typing? There are no real rules in this area, but we can certainly develop some preferences.
When programming in Groovy, I lean toward omitting the type and instead making the parameter/variable names very expressive. Not specifying the type has the added advantages of duck typing (Section 3.4, Design by Capability) and the ease of applying mocks for testing (Section 18.2, Unit Testing Java and Groovy Code).
I opt to specify the type if I am forced to, like when JUnit requires test methods to be void or when specificity provides a significant benefit, like when mapping types ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.